What Causes Brownish Vaginal Discharge After 6th Week Of Pregnancy?

Hey . I m 23yr age.10 month married nd I got my first pregnancy 5months of my marriage it was well going but soon I got to know sum bleeding that cause misscarriage at 5th week pregnancy stopped. Now after 2 month of my dnc I m again pregnant nd at 6th week 0f pregrancy I done scan to check fetus condition thn dr said fetus heartbeat not good n fetus size 7 cm and she give me htdroxyprogestone injection and folic acid,loprine ,osnate and after 14 days i have browinsh discharge i am to much uoset please sugest me and advice me ..:-(